Đáp án:
\({V_{{H_2}}} = 2,24{\text{ lít}}\)
Giải thích các bước giải:
Phản ứng xảy ra:
\(Fe + 2HCl\xrightarrow{{}}FeC{l_2} + {H_2}\)
Ta có:
\({n_{Fe}} = \frac{{5,6}}{{56}} = 0,1{\text{ mol = }}{{\text{n}}_{{H_2}}} \to {V_{{H_2}}} = 0,1.22,4 = 2,24{\text{ lít}}\)
\({n_{HCl}} = 2{n_{Fe}} = 0,1.2 = 0,2{\text{ mol}} \to {{\text{V}}_{dd{\text{ HCl}}}} = \frac{{0,2}}{2} = 0,1{\text{ lít}}\)
\({n_{FeC{l_2}}} = {n_{Fe}} = 0,1{\text{ mol}} \to {{\text{m}}_{FeC{l_2}}} = 0,1.(56 + 35,5.2) = 12,7{\text{ gam; }}{{\text{C}}_{M{\text{ FeC}}{{\text{l}}_2}}} = \frac{{0,1}}{{0,1}} = 1M\)